Line-spacing mechanism



C. SPIHO.

LINE SPACING MECHANISM.

APPLICATION FILED Novl I5. I92o.

-Lgjgw I l Patented Jan. 39l922.,

2 SHEETS-SHEET l.

@ms /Safwy C. SPIRO.

LINE SPACING MECHANISM. APPLICATION FILED N.ovv,15, 1920.

Patented Jn. 3,1922.-

2 SHEETS-SHEET 2.

o 5 ZJ 'unirg *arenas ATIENT (OFFICE.

CHARLES SPIRO, OE NEW YORK, N. Y., ASSIG-NOR TO FEDERAL ADDING- MACHINE v CORPORATION, 0F' NEW YORK, N. Y.A CORPORATION OF NEW JERSEY.

LINE-SPACING MECHANISIVI.

Specication of Letters Patent.

Patented J1' an. 3, 1922.

To all whom t may concern 1 Be it known that I, CHARLES SPIRO, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Line-'Spac-` ing Mechanism, of which the following is a Specification This invention relates to a line spacing mechanism and particularly to a constructionl in which the platen and line spacing members cooperating therewith are case shifted relative to the line space lever upon the carriage frame.

The invention has for an object to provide a novel and improved construction of space pawl lever and detent mounted upon the same pivotal f center and connected by a spring so as to be tensioned in opposite directions, together with a gage lever mounted upon the pawl lever and coacting with variable space steps upon the detent.`

A further object of the invention is to present an improved structure of space pawl ever and detent carried by a case shifted platen frame and provided with means to engage a compensating face upon a line space lever pivoted uponthe carriage frame.

Another object of the invention is to provide a novel construction and arrangement of the space pawl lever, detent, and line space lever whereby a single spring tensions all of the parts, and the pawl lever entirely supports the gage or variable space lever.

Other and further objects and advantages of the invention will be hereinafter set forth and the novel features thereof defined by the appended claims.

In the drawings- Figure 1 is a side elevation of the invention;

Figure 2 is a plan thereof;

Figure 3 is a front elevation;

Figure 4 is a detail front elevation of the pawl lever, detent and Figure 5 is a `detail e space lever pivot;

Figure 6 is a section on line 6-6 lof Figure 5;

Figure 7 is a detail in stud; and

Figure 8 is a detail of the space pawl lever. Like numerals refer to like parts inthe several figures of the drawings. j

The numeral 10 designates the top plate age lever; evati'on of the line of the detent retain- Vprovided with an actuating finger 30 havof a typewriting machine and may be of any desired construction yor configuration, and upon which the platen carriage 11 travels in the usual manner. The end wall 12 of this carriage supports the frame 13 carrying a case shifting platen 14 and pivoted at 49 to be actuated by the rear rail 50 in the .usual manner. These parts may be of any preferred character, for instance as shown in my application filed Feby; 14, 1920, Serial No. 358,593. d

The frame 13 has projected laterally therefrom a post 15 upon which the space pawl lever 16 -is pivotally mounted. This lever is preferably formed with a yoke-shaped portion 17 at its pivotal end. The depending arm 18 thereof has the spacing pawl 19 pivoted thereto at 20. ,The tooth 21 of this pawl is deflected or bent to engage with the teeth of the usual ratchet wheel 22 upon vthe platen shaft 23 when the pawl is swung forward in the spacing action. The pawlA is also provided with a retracting tail 24 disposed to engage a pin or projection 25 from the frame 13 in the rearward movement of the pawl which acts to cam the tooth thereof away from the ratchet wheel.

The pawl lever 16 is actuated by a line spacing lever 26 having a deflected portion 27 to pass beneath the platen shaft and a vertically disposed elongated pivoting hub 28 mounted within a recess by the pivot pin 29 carried bythe end wall 12 of the carriage frame.` The upper portion of thls hub is ing a plane or flat compensating face 3l. of sufficient area to provide for the case shifting movement of the platen. This face engages a spherical or ball stud 32 extended from the pawl lever so as to reduce the friction in the spacing and case shlftlng operations to a minimum. The post 15 has mounted thereon a pivoting stud or screw 33 upon which the detent lever 34 is mounted and the lower end there- 100 of is deflected outward and carries the usual detent wheel 35 engaging the teethof the ratchet wheel 22. The detent is heldin contact with the ratchet wheel 4by a coiled spring 36 surrounding the post 15 and se- 105 cured at one end to the detent lever and atl Y its opposite end to the pawl lever which effects a retraction of the latter as the detent is thrown toward the ratchet wheel and also maintains the line space lever in its normal 110 position. The control and restoration of all of the parts is thus effected by a single spring. For the purpose of retaining th1s detent out of contact with the ratchet Wheel when it is desired to release the same, a stud 37 is provided upon`the detent and coacts with the countersink of a bushing 38 upon the carriage frame, as shown in Figure 7.

Upon the outer face of the pawl lever a gage or variable space lever 40 is pivoted at 41 and provided at its upper end with a handle 42. The lower end of the gage lever is formed with a stop 43 to determine the extent of throw of the pawl lever by engaging any one of a series of variable space steps 44 upon the lower portion of the detent lever.

The gage lever may be held in its adjusted position by any desired means, such as a springpin 45 thereon disposedto engage cooperating seats 46 in the extension 47 from the pawl lever. This extension is provided upon its upper face with indicating characters -48 to determine the extentfof spacing.,v

An adjustment of this gage lever limits the travel of the pawl and the consequent rotation of'the platen for onemtwo or three spaces. c i

In the operation of the invention pressure upon the line space lever toward the right causes the actuating finger to engage and move the pawl lever toward the ratchet wheel and against the tension of the spring connecting the pawl lever to the detent lever. This action effects the line space feeding`and tleextent thereof is determined by. the position of the gage or variable space lever carried by the pawl lever and contacting with the steps upon the detent. The latter may be retained out of contact with the ratchet wheel when it is desired to release the latter. By mounting the pawl lever and detent upon the same pivotal center and connecting them by the tension spring, the single spring controls both levers and also the line space lever upon thel carriage frame.

kThe pawl lever also forms a support for the gage lever and its Iindicating devices and permits the same to act against the detent which is braced by *its contact with the ratchet wheel. The arrangement disclosed herein permits the free case shifting with the platen of all the parts engaging the ratchet wheel and provided for`L compensation between the pawl lever and the relatively ixed line space lever.

ile onespec1fic application of this invention has been shown 4and described herein the same is not confined thereto as changesI and alterations may be made in the construction without departing from the spirit of 'the invention as defined by the following claims.

What I claim is- 1. The combination with a l platen pro-A vided with a ratchet wheel, of a ,pawl lever pivoted upon a post, a detent lever mounted uponthe same pivotal center, a line space lever disposed to engage and actuate said A pawl lever, and a tension spring connecting said pawl and detent levers.

2. The combination with a platen provided with a ratchet wheel, of a lever pro- `of to feed said wheel and provide with a retracting tail, arelatively lixed projection in the path of said tail, a detent lever mounted at the pivotal center of the pawl lever and `having a roll engaging said wheel, a spring connected to move said pawl and detent levers in opposite directions, and a line space lever disposed to actuate said pawllever.

4. In a line space mechanism, a frame provided with a post, a pawl lever pivoted thereon and extending readwardlyr and downwardly therefrom, a feed pawl pivoted upon the lower portion of said lever, a detent lever pivoted upon said post, and a tension spring surrounding the post and connected at opposite ends to the pawl and detent levers.

5. In a line space mechanism, a frame provided with a post, a pawl lever having a yoke-shaped upper portion pivoted thereon, a detent lever pivoted upon' the post within said portion, a spring surrounding the post and connected to said pawl and .detent levers, and a line space lever disposed to actuate said pawl lever.

6. In a line space mechanism, a frame, a-

pawl lever pivoted thereon and provided with a feed pawl, a -detent lever pivoted upon the frame and formed with variable spaced steps, agage lever pivoted upon the pawl lever and havinga stop to engage said steps, a spring retaining device upon/ said gage lever adapted to seat at fixed points e 'upon said pawl lev1er, and a line space lever disposed to actuate said pawl lever.

8. In a line space mechanism, a case shifting platen frame, a platen and ratchet wheel thereon, a pawl lever pivoted to oscillate in a vertical plane at the rear of-the ratchet wheel and provided with a feed pawl,

a line spaced lever having a vertical pivot upon the carriage frame, and an actuating linger from the line space lever having a compensating face at the rear of the pawl/ lever to engage a contact.

9. In a line space mechanism, a case shifting platen frame, a platen and ratchet wheel thereon, a lever pivoted upon said frame to oscillate in a vertical plane and provided with a feed pawl, a lateral actuating projection from said lever, and ai line space lever having an actuating finger movable in a horizontal plane and provided with a compensating face disposed in the path of ,travel of said projection. sa

10. In -a line space mechanism, a case shifting platen frame, a depending lever pivoted thereon and provided with a feed pawl at its lower end, a spherical projection from said lever, and a vertically pivoted line space lever having a plane actuating part thereof in moving finger to engage said projection.

11. In a line space mechanism, a case shifting platen frame, a depending lever pivoted thereon and provided with a feed pawl at its lower end, a projection from said lever having a curved contact face, and a pivoted line space lever having a vertically disposed plane actuating finger for rolling contact with said projection.

12. In a line space mechanism, a case 'shifting platen frame, a feed pawl lever pivoted thereon and provided with a lateral spherical actuating projection, a detent lever mounted upon the plvotal center of the pawl lever, a line space lever pivoted upon a carriage frame at the rear of said pawl lever and having a forwardly extending actuating finger with a face engaging said projection in either case shifted position, and a tension spring connecting said pawl and detent levers whereby all levers are controlled by a single spring.

13. In a line space mechanism, a pawl lever provided at its upper portion with a pivoting yoke and a rearward extension with an angular indicating face, a depending arm from said lever having a feed pawl pivoted thereon, and a line space lever disposed to actuate said pawl lever.

14. In a line space mechanism, a pawl lever provided at its upper portion with a pivoting portion and a rearward extension having retaining seats and an indicating face, a depending arm from said lever carrying a feed pawl, a gage lever pivoted upon said arm and havin means to engage said seats, an abutment or said gage'lever, and a line space lever disposed to actuate said pawl lever. c

15. In a line space mechanism, a pawl lever provided at its upper portion with pivoting means, a depending arm from said levercarrying a feed pawl, a gage lever pivoted upon said arm and having a stop face, a pivoted detent lever having variable space steps disposed to abut said face, and a line space lever to actuate said pawl lever.

In testimony whereof I aiiix my signature.

CHARLES SBIRO. 

